问题描述

asp.net开发微信公众平台通过接口上传图片到微信服务器后台

asp.net开发微信公众平台通过接口上传图片到微信服务器后台，就要代码。

ASCIIEncoding encodings = new ASCIIEncoding();
HttpWebResponse webResponses = null;
string s = zone.Substring(0, zone.Length - 1);
s = s.Substring(1, s.Length - 1);
string imgurl = picssss.PostedFile.FileName;

    HttpWebRequest webRequests = (HttpWebRequest)WebRequest.Create("https://api.weixin.qq.com/cgi-bin/media/uploadimg?access_token=" + s );

    //使用post方式提交
    webRequests.Method = "POST";
    string responseStrs = null;
    webRequests.Timeout = 50000;
    //要post的字节数组
    string postDatas = "";
    //?grant_type=client_credential&appid=wx875bfe9a60fc304f&secret=4e6180a6cd8e1425918ecf7cb22c36e9
    byte[] postBytess = encodings.GetBytes(postDatas);

    webRequests.ContentType = "application/x-www-form-urlencoded;";
    webRequests.ContentLength = postBytess.Length;

    using (Stream reqStream = webRequests.GetRequestStream())
    {
        reqStream.Write(postBytess, 0, postBytess.Length);
    }
    try
    {
        //尝试获得要请求的URL的返回消息
        webResponses = (HttpWebResponse)webRequests.GetResponse();
    }
    catch (Exception)
    {
        //出错后直接抛出
        throw;
    }
    finally
    {
        if (webResponses != null)
        {
            //获得网络响应流
            using (StreamReader responseReader = new StreamReader(webResponses.GetResponseStream(), encodings))
            {
                responseStrs = responseReader.ReadToEnd();//获得返回流中的内容
            }
            webResponses.Close();//关闭web响应流
        }
    }

    //JObject jos = (JObject)JsonConvert.DeserializeObject(responseStrs);
    //string zones = jos["url"].ToString();
    Response.Write(responseStrs);
    return responseStrs;

}

    或者帮着改改这个代码  我不知道哪里图片改写哪里，菜鸟一个  求大神出手啊。

解决方案

用webclient就可以，没那么麻烦

参考：http://www.2cto.com/kf/201402/280196.html

解决方案二：

asp.net微信公众平台开发
asp.net微信公众平台开发
asp.net微信公众平台开发